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Join Date: Jun 2005

Posts: 23

Reputation: Rete is an unknown quantity at this point

Solved Threads: 1

Rete

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Newbie Poster

Regular Exp

Jun 24th, 2005

Sorry, I know that this is probably the wrong section to post this question in, but I'm sort of confused as to which one would have been appropriate. Anyways, I've been using regular expressions to find specific information such as e-mail addresses and whatnot inside textfiles, but I can't get my head over this one problem.

The problem my expression faces, is getting it to stop looking at a string. I was wondering if there's anyway I could expand the NOT parameters to include entire strings, rather then just one character.

For example, given the string:

Only pick up strings without Capital letters!

My regular expression would get:

Only pick up strings without Capital letters!

Any help would be great

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Join Date: Oct 2004

Posts: 4,062

Reputation: vegaseat is just really nice

Solved Threads: 936

vegaseat

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DaniWeb's Hypocrite

Re: Regular Exp

Jun 25th, 2005

I wrote this little function in Python. It scans a string and returns True the moment it finds a capital letter, otherwise False. Hope this helps ...

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
# tested with Python24
 
def hasCap(s):
    """returns True if the string s contains a capital letter"""
    for num in range(65, 91):  # A to Z
        capLetter = chr(num)
        if capLetter in s:
            return True
    return False
 
str1 = 'Only pick up strings without Capital letters!'
str2 = 'only pick up strings without capital letters!'
 
# test the function hasCap()
if hasCap(str1):
    print "str1 has a capital letter"
else:
    print "str1 has no capital letter"
 
if hasCap(str2):
    print "str2 has a capital letter"
else:
    print "str2 has no capital letter"
# tested with Python24

def hasCap(s):
    """returns True if the string s contains a capital letter"""
    for num in range(65, 91):  # A to Z
        capLetter = chr(num)
        if capLetter in s:
            return True
    return False

str1 = 'Only pick up strings without Capital letters!'
str2 = 'only pick up strings without capital letters!'

# test the function hasCap()
if hasCap(str1):
    print "str1 has a capital letter"
else:
    print "str1 has no capital letter"

if hasCap(str2):
    print "str2 has a capital letter"
else:
    print "str2 has no capital letter"

Last edited by vegaseat; Oct 25th, 2009 at 2:25 pm. Reason: update code tags

May 'the Google' be with you!

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Join Date: Jun 2005

Posts: 23

Reputation: Rete is an unknown quantity at this point

Solved Threads: 1

Rete

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Newbie Poster

Re: Regular Exp

Jun 25th, 2005

Thanks, that's exactly what I want it to do, except I'm trying to do that using Regular Expressions. Is there a way I could change the anchors (^ and $) so that it reads the beginning of every string, rather then at the beginning of every file?

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Join Date: Oct 2004

Posts: 4,062

Reputation: vegaseat is just really nice

Solved Threads: 936

vegaseat

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DaniWeb's Hypocrite

Re: Regular Exp

Jun 26th, 2005

I stopped at this regex for Python site:
http://www.amk.ca/python/howto/regex/
to refresh my brain on regex. I am really rusty!

May 'the Google' be with you!

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Join Date: Jun 2005

Posts: 23

Reputation: Rete is an unknown quantity at this point

Solved Threads: 1

Rete

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Newbie Poster

Re: Regular Exp

Jun 29th, 2005

Thanks for your help. :mrgreen:

It took me quite a while, but I found out how to do it. Just in case anyone else has similar problems, what I did was I made an or statement that said the first letter had to be a space, followed by a capital, or a capital at the start of a string.

Last edited by Rete; Jun 29th, 2005 at 8:53 pm. Reason: typo